/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2007 Sun Microsystems, Inc.  Portions Copyrighted 2008 Richard Schilling.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 *
 * Contributor(s): Richard Schilling (coderroadie@gmail.com)
 *
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package javax.mail;

import java.util.Vector;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import com.cognition.android.activation.DataSource;

/**
 * MultipartDataSource is a <code>DataSource</code> that contains body
 * parts. This allows "mail aware" <code>DataContentHandlers</code> to
 * be implemented more efficiently by being aware of such
 * <code>DataSources</code> and using the appropriate methods to access
 * <code>BodyParts</code>.
 * <p>
 * Note that the data of a MultipartDataSource is also available as an input
 * stream.
 * <p>
 * This interface will typically be implemented by providers that preparse
 * multipart bodies, for example an IMAP provider.
 * 
 * @author John Mani
 * @see javax.activation.DataSource
 */

public interface MultipartDataSource extends DataSource {

    /**
     * Return the number of enclosed BodyPart objects.
     * 
     * @return number of parts
     */
    public int getCount();

    /**
     * Get the specified Part. Parts are numbered starting at 0.
     * 
     * @param index the index of the desired Part
     * @return the Part
     * @exception IndexOutOfBoundsException if the given index
     *                is out of range.
     * @exception MessagingException
     */
    public BodyPart getBodyPart(int index) throws MessagingException;

}
